Service difficulty report · Rib · Boeing 7377BD

Difficulty date
June 6, 2021
Submitted
July 2, 2021
Operation
Air carrier
Aircraft
N7721E
Make and model
Boeing 7377BD
Aircraft serial
34479
Aircraft time
50,877 hours, 26,372 cycles
Part
Rib
Condition
Cracked
Location
Horizontal Stab
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LEFT STAB LEADING EDGE PANEL 3RD RIB FROM INBOARD END CRACKED ; / [01] REMOVED LH STAB LE RIB AT LE STA 95.96 IAW SRM 51-40-02-0G-0; [02] VERIFIED NEW RIB ASSY. AS P/N 186A1303-1 ATAG WN5727 PER DWG 186A1303 REV -; [03] C/W STEP 2; [04] LOCATED AND DRILLED NEW RIB ASSY. IAW SRM 51-40-05-0G-0; [05] C/W STEP 4<BR>OK TO INSTALL; [06] INSTALLED NEW RIB ASSY. AT LE STA 95.96 IAW SRM 51-40-02-0G-0; DWG 186A1303 REV -; [07] REMOVED AND REPLACED LH STAB LE RIB ASSY. AT LE STA 95.96 IAW SRM 51-40-02-0G-0; DWG 186A1303 REV - . RESTORED CIC IAW AMM 51-21-91; [08] C/W STEP 7; [09] AUDIT C/W

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